-- ________ your homework yet?
-- Not yet. I _______ it.
| A．Have you done; am doing | B．Did you do; am doing |
| C．Have you done; did | D．Did you do; did |
-- ________ your homework yet?
-- Not yet. I _______ it.
| A．Have you done; am doing | B．Did you do; am doing |
| C．Have you done; did | D．Did you do; did |
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